Spring-wire fabric.



S. BINGHAM.

PRING WIRE FABRIC.

A ATION FILED SEPT. 11. 1915.

LQQQJWQ. Patented 001. 31,1916.

@TATES PATENT UFFlQ.

SOLON BINGHAM, OF BOSTON, MASSACHUSETTS; SOLON W. BINGI-IAM ADMINISTRATOR OF SAID SOLON BINGHADI, DECEASED.

SPRING-WIRE FABRIC.

To all whom it may concern:

Be it known that I, SoLoN BINGI-IAM, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Spring-Wire Fabric, of which the following is a specification.

This invention is an improved spring especially adapted for wire fabric uses, as in chair bottoms, carriage and automobile seats, springs for beds, and other like devices, one object of the invention being to provide a spring which is bent from a single piece of wire and is formed with oppositely extending integral spring loops which keep the wire taut and which yield sufliciently to afford the desired cushioning effect and which look and prevent the wire from being stretched under stress of a weight and under similar stresses so that the efficiency of the spring is retained unimpaired, the loops returning to their original position when pres sure is removed.

Another object of the invention is to provide a spring wire fabric for use in chair bottoms and the like and which fabric is composed of a plurality of such springs arranged in crossed relation to one another.

The invention consists in the construction, combination and arrangement of devices hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a plan of a portion of a wire spring fabric constructed and arranged in accordance with my invention. Fig. 2 is a detail plan of one of the springs from which the fabric is made. Fig. 3 is a detail inverted plan of the same. Figs. t and 5 are detail sectional views on the planes indicated by the lines a-a and 6-5, respectively, of Fig.2.

My improved spring wire fabric for use in chair bottoms, carriage or automobile seats, springs for beds, and the like, comprises a plurality of spring wires 1 WlllCll are arranged angularly and in crossed relation to one another as shown in Fig. 1. Each wire 1 is an individual spring, complete in itself, and is integral and is bent at suitable points to form two oppositely extendlng Specification of Letters Patent.

Application filed September 11, 1915.

Patented (lot. 31, 1916.

Serial No. 50,255.

leads 2 and a pair of oppositely extending loops 3 which unite the leads together, the said pair of loops 3 forming, in effect, an S-shaped spring. Those portions 4: of the leads which unite with the ends of the loops are arranged in overlapping relation, are parallel with each other, and are normally spaced apart by the tension of the 8-shaped spring and the tendency of its loops to open, and each of said portions 4. extends across both sides of one of the loops as at 5. When the wire is put under excessive tension as by the weight of a load the tension on the wire causes its leads 2 to draw outwardly in opposite directions and to partly close and tighten the loops 3 until the overlapping portions 4- of the leads are drawn together and come in mutual contact, and also offer such frictional resistance to the sides of the loops which they cross as to lock the 8-shaped springs and prevent them from becoming distorted. Hence the efiiciency of the spring is indefinitely maintained and the same is prevented from being impaired, the 8-shaped springs, when relieved of the weight or tension, tending to reopen or enlarge the diameter of their loops and to again, in so doing, space the overlapping portions 4t of the wire leads.

Having thus described my invention, I claim A spring-wire fabric embodying a series of springs each comprising a wire bent to form two oppositely extending leads and a pair of oppositely extending loops uniting the leads and forming a substantially S-Shaped spring, the said leads having normally spaced parallel overlapping portions where they unite with the loops, each of said overlapping portions extending across both sides of one of the loops, the said springs being arranged angularly and in crossed relation to one another.

In testimony whereof I aflix my signa ture in presence of two witnesses.

SOLON BINGHAM.

Witnesses:

HERMAN V. WEISS, SoLoN W. BINGHAM.

Gopiee of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

